linux-kernel - Re: [PATCH v5 1/4] iio: industrialio-backend: support backend capabilities

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Message-ID: <644c6549-e2e2-432f-aff9-48a37fcbb9b3@vaisala.com>
Date: Tue, 3 Feb 2026 12:45:44 +0200
From: Tomas Melin <tomas.melin@...sala.com>
To: Nuno Sá <noname.nuno@...il.com>,
 David Lechner <dlechner@...libre.com>,
 Michael Hennerich <Michael.Hennerich@...log.com>,
 Nuno Sa <nuno.sa@...log.com>, Lars-Peter Clausen <lars@...afoo.de>,
 Jonathan Cameron <jic23@...nel.org>, Andy Shevchenko <andy@...nel.org>,
 Olivier Moysan <olivier.moysan@...s.st.com>
Cc: linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 1/4] iio: industrialio-backend: support backend
 capabilities

Hi,

On 03/02/2026 12:01, Nuno Sá wrote:
> On Mon, 2026-02-02 at 15:04 +0200, Tomas Melin wrote:

>>
>> Yes, this is debatable. It's not necessarily always on, but should not
>> be enabled/touched by the frontend during probe.
>> But anyways, having a capability that says if the enable/disable feature
>> is available, is in any case useful and what I was planning on
>> leveraging in my use case.
>> Fundamentally, with the capabilites as now proposed, it is possible to
>> select what features of the ad9467 are available, in addition to the
>> basic requirements.
> 
> Yeah but this is just tweaking for your special case.

Actually goal for me is just to have the optional features of the
backend really optional. In a sense, it's tweaking for my use case but
at the same time it's making things work more generally.

That said, this always_on is not a showstopper for me. Since it seems
there is no real consensus over that capability, I can drop the
ALWAYS_ON for next version of the series.

Thanks,
Tomas